Type-writer carriage construction



V PATENTED FEB. 16, 1904.

J. ALEXANDER.

APPLLIGATION FILED 1330.1. 1902.

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I J. ALEXANDER. TYPE WRITER CARRIAGE CONSTRUGTION.

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Patented February 16, 1904.

UNITED STATES PAT Nr OFFICE.

JESSE ALEXANDER, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE-HALF TO ERIC NILSON, OF NEW YORK, N. Y., AND JULIUS AUGUST LAFRENTZ,

OF BROOKLYN, NEW YORK.

TYPE-WRITER CARRIAGE CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 752,191, dated February 16, 1904.

Application filed. December 1, 1902. Serial No. 133,430. (No model.)

To all whom it may concern:

I Be it known thatI, J EssE ALEXANDER, a citizen of the United States, residing at Brooklyn, in the county of Kings, State of New York,

5 have invented certain new and useful Improvements in Type-Writer Carriage Construction,

of which the following is a full, clear, and exact description.

My invention relates to type-writing ma- I chines, and particularly to the carriage construction therefor. The structure has been designed especially for use with a machine of the class of machines in which the writing is imprinted upon the paper on a horizontal line I in front of a revoluble and longitudinallymovable platen and visible to the operator.

Obviously many of the advantages may be attained by its use with other forms of machines.

It is desirable where a single machineis likely to be called upon to perform service under varying conditions and for different classes of work that at times it may be possible to use .a carriage much wider than that ordinarily employed. At such times it is convenient that the carriage structure in use may be readily and quickly removed from the main body of the machine and a carriage and platen of a greater width or capacity inserted in its place. This must be done with as little mechanical 3 alteration or adjustment as'possible, inasmuch as the ordinary operator is not always skilled in mechanicalconstructions.

It is the object of my invention to provide a carriage structure which may be readily attached or detached from the main body portion of the machine without interfering with the proper adjustment of its mechanism and with but as little exertion and interchange of partsas possible.

Theinvention will be found to consist in the improvements hereinafter described and as shown in the accompanying drawings.

Figure 1 is, a rear elevation of parts of a machine'and carriage structure embodying my invention.

side elevation of part of the above structure. Fig. 3 is a plan view of a portion of a type- Writing machine adapted to coact with the Fig. 2 is a fragmentary detail.

carriage structure of my invention. Fig. 4 is a detail plan view of part of the carriage 5 structure. Fig. 5 is a section and side elevation of a machine embodying the improvements of my invention.

1 is a platen pivotally mounted on a shaft 10 in the side frames 2 2. These side frames are pivotally mounted in the side plates 21 21. At the rear the side plates are connected by means of a bar 22. This bar 22 is connected to a sleeve portion 23, which provides the rear guide of the platen-carrying structure in conjunction with the guide-rod 3. At the front the side plates 21 21 are connected together by means of a rod 24, which is adapted to travel across the machine freely and rest on the grooved roller 25. The auxiliary rod 26 5 connects the side frames 2 2 together and is supported by a roller 27.

I The rear rod 3, which is also the main guiderod, is supported inside brackets 3131, to which it is securedby means of the screws 7 32' 32. The bracket 31 at the left of Fig. 1

is cut away slightly to form a recess 30, in which the corresponding end of the rod 3 rests. This facilitates the assembling of the parts in positioning the rod 3 when attaching the screw 32 and also serves to hold the rod 3 securely against rotation. The two side brackets 31 31 are secured to and made a part of the connectingrplate 32, which extends from one side of the machine to the other. 30

The main frame of the machine 4 is connected at the rear by the supporting-plate 41, upon which the connecting-plate 32 is adapted to rest. From the bottom portion of the connecting-plate 32 project the pins or projec- 5 tions 33 33, which take into recesses in the supporting-plate 41 at the opposite ends. When the connecting-plate 32 has been mounted upon the supporting-plate 41 and in such a position that the pins 33 33 fit in the corre- 9 sponding recesses in the supporting-plate 41, the two parts may be secured together by means of the screw 34, which passes through a drilled hole in the supporting-plate 41 and takes into a tapped hole in the connectingplate 32. This plate 32 is cut away at or near the central portion in order to make room for clearance of the parts of the feed mechanism shown particularly in Figs. 3 and 5.

The feed-mechanism parts consist of the supporting-posts5 5, in which is mounted a shaft 51. The escapement-dog, which coacts with the rack 6, carried by the general carriage structure, is pivotally mounted by means of this shaft 51. The operation of the escapement-dog may be more plainly seen from an inspection of Fig. 5. In this figure I have designated the universal bar by the numeral 61. This is that portion of the machine which is adapted, as in all machines of this general class, to be acted upon by the type-bars as they approach the printing position. The universal bar is connected by means of the arm 62 with the universal shaft 63, which is suitably mounted'in the frame of the machine. From the rear of this universal shaft projects an arm 64:, which is connected to the link 65 and thence to the short lever 66. In this manner the operation of the universal bar rotates the rock-shaft 67 slightly when the type-bar mechanism is operated. The rocking of this shaft 67 raises and lowers the short link 68, and thus vibrates the escapement-dog about its pivot 51. 690 is a helical spring attached to the escapement-dog 69 for the purpose of giving it a normal tendency to the position shown in Fig. 5, in which a spring-pressed tooth 691 is in engagement with a tooth of the rack 6.

The plate 32, carrying the brackets 31 and 31, may be thus removed by simply loosening the screw 34. The entire carriage structure may then be easily lifted off from the machine, when another carriage may be put in place. The parts of the carriage are so proportioned and disposed relatively to each other that the rack 6 will not interfere with the dog 69 in the act of removing or replacing the carriage.

When the carriage is removed, all the parts situate-d below the carriage position are acces-' sible and may be adjusted as desired.

The advantages of such a structure will be apparent to one skilled in the art.

What I claim is 1. In a type-writer, a carriage construction including a supporting-plate, a connectingplate extending from one side of the machine to the other, a screw for holding the connecting plate against the supporting plate, a bracket carried at each end of said connectingplate, a guide -rod mounted between said brackets, side frames, a rod for connecting said side frames, means for slidably mounting said connecting-rod on said guide-rod, and a platen revolubly carried by said side frames.

2. In a type-writer, a carriage construction including a supporting-plate, a connectingplate, pins projecting from said connectingplate coacting with recesses in said supporting-plate, a screw for holding the connectingplate against the supporting-plate said supporting-plate being cut away to form a passage for parts of a feed mechanism, brackets carried at both ends of said connecting-plate, a guide-rod mounted between said brackets, side frames, a rod for connecting said side frames, means for slidably mounting said connecting-rod on said guide-rod, anda platen revolubly carried by said side frames.

3. In a type-writer, a carriage construction including a supporting-plate, a connectingplate, pins projecting from said connectingplate coacting with recesses in said supporting-plate, a screw for holding the connectingplate against the supporting-plate, said connecting-plate being continuous from side to side of the machine and cut away to form an opening through which parts of a feed mechanism may project, brackets carried at both ends of said connecting-plate, a guide-rod mounted between said brackets, side frames, a rod for connectlng said side frames, means for slIdably mounting said connecting-rod on said guide-rod, and a platen revolubly carried by said side frames.

1. A type-writer carriage construction including a supporting-plate, means for securing said plate against the frame of a machine, an escapement-dog mounted above said plate a connecting-plate cut away at its central portion to allow for the said escapement-dog, side brackets mounted on said connecting-plate, a main guide rod for the carriage structure mounted in said side brackets.

5. In a type-writer, a carriage construction including a supporting-plate, an escapementdog mounted above the same said supportingplate being cut away near its central portion, a helical spring connected to said escapementdog said plate being cut away to allow for said spring, a supporting-plate resting on said connecting-plate and cut away to allow for said escapement-dog and attached parts, side brackets secured to the ends of said connecting-plate, a guide-rod carried by said side brackets, a platen and means for guiding said platen on said guide-rod.

6.- A type-writer carriage construction including a supporting-plate having recesses therein, a connecting-plate, pins projecting from the under side of said connecting-plate adapted to fit intosaid recesses, side brackets carried by said connecting-plate, a main guiderod carried by said brackets and means independent of the pins for drawing the two plates together.

7. A type-writer carriage construction including a supporting-plate having recesses therein, a connecting-plate, pins projecting from the under side of said connecting-plate adapted to fit into said recesses, side brackets carried by said connecting-plate, a main guiderod removably carried by said brackets and therein, a connecting-plate, pins projecting from the under side of said connecting-plate adapted to fit into said recesses, side brackets carried by said connecting-plate, a main guiderod removably carried by said brackets, one of said brackets being cut away to form a holding-recess for one end of said rod.

9. A type-Writer carriage construction including a supporting-plate having recesses therein, a connecting-plate, pins projecting from the under side of said connecting-plate adapted to fit into said recesses, a fasteningscrew for holding said connecting-plate against said supporting-plate, side brackets carried by said connecting-plate, and a main guide-rod removably carried by said brackets, one'of said brackets being cut away to form a holding-recess for one end of said rod.

10. A type-Writer carriage construction including a supportingplate having recesses therein, a connecting-plate, pins projecting fronithe under side of said connecting-plate adapted to fit into said recesses, side brackets carried by said connecting-plate, a main guiderod carried by said brackets, and a fasteningscreW for holding said connecting-plate against said supporting-plate.

11. Atype-writer carriage construction including a supporting-plate having recesses therein, a connecting-plate, pins projecting from the under side of said connecting-plate adapted to fit into said recesses, side brackets carried by said connecting-plate, a main guiderod removably carried by said brackets, and a fastening-screw for holding said connecting- 35 

